王老先生，75岁，前列腺增生，拟行经尿道前列腺电切术。术前留置导尿应采取的卧位是
A.截石位
B.屈膝仰卧位
C.半卧位
D去枕仰卧位
E.侧卧位
查看答案
长期留置导尿的患者，出现尿液浑浊、沉淀或结晶时应
A．经常清洁尿道
B．膀胱内用药
C．热敷下腹部
D．多饮水，并定时进行膀胱冲洗
E．经常更换体位
护士小李在为男病人导尿时，将阴茎抬起，使阴茎与腹壁成600，他这样操作的目的是
A使耻骨下弯消失
B使耻骨后弯消失
C顺利通过尿道的3个狭窄处
D使耻骨上弯消失
E.E．使耻骨前弯消失
When estimating a demand function for a good where quantity demanded is a linear function of the price, you should
A. not include an intercept because the price of the good is never zero.
B. use a one-sided alternative hypothesis to check the influence of price on quantity.
C. use a two-sided alternative hypothesis to check the influence of price on quantity.
D. reject the idea that price determines demand unless the coefficient is at least 1.96.
The t-statistic is calculated by dividing
A. the OLS estimator by its standard error.
B. the slope by the standard deviation of the explanatory variable.
C. the estimator minus its hypothesized value by the standard error of the estimator.
D. the slope by 1.96.
微信支付 
支付宝支付